To create a language, a user must be an Optimizely <<product-name>> administrator.
From within the **Admin Console**, go to **Administration** \> **Localization** \> **Languages.**
Select **Add New Language**.
Fill in the following fields with the information relevant to the language being created:
(Required) **Language Code** – The ISO 639-1 code for the country and the culture. For example, Spanish for Mexico would be "es-mx".
(Required) **Description** – A short descriptive name of the language being created
**Culture Code** – In this field (added in version 3.6), populate the language culture name. Typically, this field is left blank, as the scenario for its use is rare. An example, en-US is English in the United States and fr-MC is French in Monaco. A full list of these language culture names can be found at Wikipedia.org, Microsoft.com, or iso.org for a small fee.
**Image File Path** – URL for image file to represent language (commonly used for flag images). The maximum size for this image is 16x16 px
**Alternate Languages** – Additional alternate language codes for specified language entered as a comma separated list.
If this field is needed and is not visible, it can be exposed using the Application Dictionary. Refer to this article for more information: Working with Properties in the Application Dictionary
**Default System Language** – Sets language as the default for the application. This is used as the From language for machine translations using a translation service. English (EN) should be set as the Default System Language.
**Has Device Specific Content** – Sets whether device-specific (Desktop, Tablet or Mobile) content can be created for the specified language.
Click **Save and Add** to save the language record.